I guess the reason why real estate agents in Shenzhen are so aggressive is because the competition is fierce.
Just to illustrate: The real estate company that arranged for me to view some apartments here back in September (this year) has since shuttered its business. The fact that its boss probably absconded with company funds is beside the point. Like convenience stores in Taipei, you can see a handful of real estate companies littered along a typical street in Shenzhen’s city centre. That’s why to survive, agents are out on the streets in full force most of the time.